Intent跳转并清除历史

设有Activity跳转历史 A->B->C->D。当前在D，想要跳到B，并得到A->B, 而不是A->B->C->D->B

则在跳转时要设置flag: Intent.FLAG_ACTIVITY_CLEAR_TOP

Intent intent = new Intent(D.this, B.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);

详见:

http://blog.csdn.net/lvxiangan/article/details/42120951